Feed-water heater.



J.Y1 0LL00K, DEGD. A. J. POLLOGK, BXBGUTRIX.

FEED WATER HEATER.

APPLIOATION FILED 00T.15, 1910.

Patented Nov. 19, 1912.

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J. POLLOGK, DECD.

A. J. POLLOGK, BXBOUTBIX.

FEED WATER HEATER.

APPLIOATION FILED 00T.15, 1910.

Patented Nov. 19, 191.9.

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UNITED srArEs PATENT orme JOHN POLLOCK, 0F BELFAST, IRELAND; ANN JANE PLLOCK, EXECUTRIX OF SAID TOI-IN POLLOCK, DECEASED, ASSIGNOR TO JAMES POLLOCK, 0F BROOKLYN, NEW

YORK.

FEED-WATER HEATER.

Specification of Letters Patent. j

Patented Nov. 19, 1912.

To all 'whom it may concern:

Be it known that I, JOHN` PoLLocK, a subject of the King of Great Britain, residing at Belfast, Ireland, have invented certain new and luseful Improvements in Feed- Water Heaters, of which the following is a specification.

This invention relates to feedwater heaters for use in connection with steam boilers, of the type described in the specification of my United States Patent No. 932810 dated 31st August, 1909, in which steam is used for raising the feedwater to the desired temperature before feeding same to the boiler, and the object of the present invention is to construct a heater of this class which is specially adapted for use in connection with locomotive boilers. By the use of the present invention in connection with locomotive boilers there is a considerable saving in fuel and the steaming capacity of the boiler is improved, while the high temperature at which the water is fed to the boiler saves undue strain on tubes, stays and plates, moreover, all sediment contained in the feedwater is deposited inthe heater and can be removed from time to time, as desired, and is not carried into the boiler.

In order that my said invention may be properly understood, I have hereunto appended two explanatory sheets of drawings, whereon:-

Figures l and 2 are sectional views of a heater as constructed under this invention.

In carrying out my invention, the heater, which is, or may be, fitted on the top of the boiler behind the funnel or in any other suitable position, occupies very little space and may be inclosed in a metal casing. The heater, preferably,`consists of a suitable cylinder or casing A which may be made in two parts suitably secured together and divided internally into upper and lower compartments l, 2, by means of a division plate a having openings Z) therein. The cylinder or casing A is closed at its upper end by means of an end piece c to the exterior of which is lsecured a hollow cover plate d which forms a steam chest for the steam entering the heater by means of the opening e.

Fitted in the upper compartment l of the j heater are two hollow stepped receptacles f which communicate with the lower compart- `the discharge opening z' casings or tubes m,

ment 2 by means of the openings b in the division plate a. The end piece c is shaped on its under side so as to form a cover c1 for the receptacles f, said cover c1 being so arranged that water from the interior of the compartment l can'pass into the interior of the stepped receptacles f when the heater is in operation, as indicated by the arrows. The end piece c is provided with two series of openings g which permit of steam passing from the hollow cover plate d to the interior of the stepped receptacles j while, in the central opening of each of the series of openings g, a downwardly projecting tube or pipe g1 is fitted for conducting steam to the interior of two hollow receptacles f1, f1, fitted in the lower compartment 2.

The receptacles l f1, are fitted to a flanged bend /L which communicates with in the wall of the heater and are provided with conical or tapered covers y' having depending rims or extensions jl which surround the exteriors of the receptacles f1, f1, in such manner as to leave annular passageways is.

The conical or tapered covers j are provided with an opening Z at their upper ends through which the tube or pipe g1 passes, and, fitted on the upper end of each of the conical or tapered covers j is a cylindrical casing or tube m which extends upward until it contacts with the end piece c. These in conjunction with the tubes or pipes g1 form annular passageways r for the escape of air from the interior of the receptacles f1, 1, and they are provided with exit orifices n at their upper ends by means of which the air is conducted to a passage-way nl formed in the cover 01 from which it escapes to t-he atmosphere by the opening a2 in the end piece c, as shown in Fig. 2, thesize of the opening n2 being preferably regulated by means of a plug cock a4 fitted therein. Similarly air in the interior of the receptacles f can escape by means of the passage-way nl and opening a2. The coversc1 of the receptacles f are also provided with openings n3 by means of which air in the upper compartment l can likewise escape to the atmosphere by the passage-way al and opening n2. rl`he upper compartment l is provided with a feedwater inlet 0 while in the lower compartment 2 is provided the feedwater outlet i and a blow-off outlet Q. Steam is admitted to the feedwater heater by means of the opening e formed in the hollow cover plate d.

The action of the apparatus is as follows z-Steam is admitted by the inlet opening e to the heater, thereby heating same, while the air in the interior of the heater escapes to the atmosphere by the annular passage-ways r, orifices n, passage-way nl, and openings filing. Feed-water is admitted by the inlet opening 0 to theupper compartment Vl, and, mixing with the steam therein, fills the interior thereof and passes over the lips of the receptacles f, as shown by the arrows, into the interior of said receptacles. l into the lower compartment 2 contacting with the exterior surfaces of the conical or tapered covers j in its passage and absorbing heat therefrom. The water gradually fills the compartment 2, and, rising up the annular passage-ways c,p'asses over into the f1, from interior of the receptacles f1, y whence it passes by thepassageway in the flanged bend it to the discharge opening z'. By means of the blow-off outlet g, all sediment deposited from the feedwater in the compartment can, from time to time,.as required, be blown out, thereby preventing same entering the boiler. y

Owing to the construction of the heater, the feedwater isbrought intoA contact with the steam supply from its moment of entry and the arrangement of the heater is such Y that, as the feedwater passes through same,

its temperature gradually rises until, at the point of discharge, it approximates the temv perature of the steam supply itself.

. prising,

Having now fully described my invention, what I claim and desire to secure by Letters Patent is 1. A feed water heater forvboilers comr in combination,` a steam-heated hollow structure, an upper compartment in the structure, a stepped receptacle in the upper compartment, means forsupplying water to' the exterior of the said receptacle, a steam chest on the structure means for supplying steam from the steam chest to the interior of the receptacle, a lower compartment in the structure, a stepped receptacle in the lower compartment, means for supplying steam to the interior thereof from the said steam chest, a cover for the latter receptacle, means for directing water from the interior of the upper receptacle to the cover of the lower receptacle, into the lower compartment and thence into the lower receptacle and so to the boiler, and means for directing air from the upper and lower compartments to the atmosphere.

2. A feed water heater for boilers comprising, in combination, a steam-heated hollow structure, an upper compartment in the The feedwater thereafter passes 4 said openings and structure, stepped receptacles in the upper compartment, means for supplying water to the eXteriors ofthe said receptacles, a steam chest on the structure means for supplying ,steam from the steam chest to the interiors of the receptacles, a lower compartment 1n the structure, stepped receptacles in the lower compartment, means for 'supplying steam to the interior thereof from the steam chest, covers for the latter receptacles, means for directing water from the interiors of the upper receptacles to the covers of the lower receptacles, into thelower compartment and thence into the lower receptacles and so to the boiler, and means for directing air from the uppr and lower compartments to the atmosphere.

3. A feed water heater for boilers comprising, in combination, a steam-heated hollow structure divided into upperrand lower compartments, means for supplying feedwater to the upper compartment, stepped receptacles fitted in the upper compartment and communicating with the lower compartment, receptacles in the lower compartment having conical covers and communieating with the lower compartment and with an outlet to the boiler, a steam chest communicating with the steam supply and with the receptacles in the upper compartment and'steam supply pipes communicating with the receptacles in the lower compartment and with the steam chest.

Zl. A feedwater heater for boilers comprising, in combination, a steam-heated hollow'structure divided into `upper and lower compartments, an end piece for the hollow structure having openings for supplying steam to the upper andl lower compartments and to receptacles fit-ted in the upper and lower compartments, a steam chest fitted on the end piece so connectedV with the steam supply, air escape means fitted in the hollow structure, means `for supplying water to the upper compartment and means for supplying water to the boiler from the receptacles in the lower compartment.

as to communicate with 5. A feedwater heaterV for boilersV com- Y prising, in combination, a hollow structure dividedr into upper and lower compartments, a steam chest in communication with the steam supply Y means for supplying steam from` the steam chest to both the upper and Ylower Vcompartments means for supplying feedwater to the upper compartment, stepped receptacles fitted in the upper compartment and communicating with the lower compartment, receptacles -in the lower compartment, detachable conical covers supported on said receptacles, a flanged bend fitted in the lower compartment supporting the receptacles therein and communicating Y with said receptacles` and withan outlet to the boiler, and air escape means in the upper compartment communicating with t-he receptacles in the upper and lower compartments.

6. A feedwater heater for boilers comprising, in combinatiom a hollow cylinder divided into upper and lower compartments, means for supplying steam to the upper compartment in the cylinder, means for supplying feedwater to the upper compartment, recept-acles tted in the upper compartment and communicating with the lower compartment, covered receptacles in the lower compartment communicating with air escape and steam supply means in the upper compartment and with an outlet to 15 the boiler.

In testimony whereof I afx my signature in presence of two witnesses.

JOHN POLLOCK. Witnesses:

ANDREW HAMILTON, HARRY W. ALLsorP.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, ID. C. 

